UKIN-State-of-the-EU-Report-1.pdf (ukandeu.ac.uk)
https://socialeurope.eu/who-guards-the-guardians-in-europe
http://cer.eu/sites/default/files/report_relaunching_eu_nov17.pdf
http://www.ecfr.eu/page/-/ECFR-_245_-_Crisis_and_Cohesion_-_A_10_Year_Review_Janning_WEB.pdf